The end of cold war indicates the collapse of the bipolar system built by US and Soviet Union together. The international system at post-cold war era also has changed obviously following the trend of globalization, and international relation keeps varying and adjusting. First, global economy has accelerated towards globalization after releasing from the yokes of cold war. As a result, the interdependence of countries become closer and closer, the overall development and diversified trend of the word become more and more obvious. All these bring a strong influence on leading powers such as China, US and E. U, and consequently a significant adjustment on their strategies and relation. Based on geopolitics, these three parties own enormous economic, military and politic influence globally and also regionally, at the same time, China, US and E. U. all take a significant strategic role in America, Asia, and Europe respectively. Therefore, their interaction is an important foundation for observation of leading powers¡¦ relation under globalization background at post-cold war era. Therefore, the discussion on factors that affect relation of three parties, features and their development trend has quite significant meaning theoretically. It is also an innovative attempt in terms of study on the overall nature, especially at the post-cold war era and under the influence of globalization. For the cold war era, Lowell Dittmer¡¦s Strategy Triangle Theory was most frequently used to discuss the strategic relation of three parties in the international system. This study, on the other hand, tires to analyze the relation of these leading powers at post-cold war era under globalization background. From their interaction, it tries to understand how one party coordinates its strategic interests with the other two parties as they are all the most important bodies in international society. It benefits the understanding of internal drives and external pressure under globalization, and also the influence of leading powers¡¦ interaction on international system. This study starts from the ¡§corners¡¨, that is, to analyze three parties¡¦ positioning in the international system and based on one party¡¦s strategy view to the other two parties and strategy planning, to understand these three parties¡¦ strategy logistics and international behavior mode. Following that, it examines the structure of the ¡§sides¡¨ from the bilateral relation of three parties. Finally, it tries to understand the ¡§overall nature¡¨ of three parties based on an examination on the interaction of China, US and E.U. on significant international topics during the 21st century. Topics including events that have significant influence and special meaning on international strategies and national interests of three parties, such as the 911 event, US attack of Iraq, deregulation on shipping weapons to China, to find out the importance and influence of ¡§terrorism¡¨, ¡§regional conflict¡¨, ¡§weapon expansion¡¨, ¡§bilateral relation¡¨ etc. factors on interaction of three-party strategy. All in all, the purpose of this study is to make out the leading powers¡¦ political logistics and model under the globalization background at post-cold war era as well as its international influence.